Attenuator riboswitch (Leader sequence) is made up of almost 140 nt which further can be divided into four Intra -complementary regions 

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#Unit 6. System Physiology – Plant

Trx have common tertiary structure called the thioredoxin fold, which consists of five antiparallel beta sheets sandwiched between three alpha helices.

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#Unit 6. System Physiology – Plant

Trx is regulated by PSII & PSI

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#Unit 6. System Physiology – Plant

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#Unit 6. System Physiology – Plant

Trx regulates plastid phosphoribulokinase (PRK) and NADP–glyceraldehyde-3‐phosphate dehydrogenase (NADP–GAPD) by noncovalent associations with the nuclear‐encoded chloroplast protein CP12 (an ≈8.5‐kDa protein)

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#Unit 6. System Physiology – Plant

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#Unit 6. System Physiology – Plant

Under ‘‘dark conditions,” the [(A4-glyceraldehyde-3-phosphate dehydrogenase) 2•(phosphoribulokinase)2•(CP12)4] is formed by CP12 called supramolecular complex.